月 Experimental section Put 10g tea powder into the folded filter paper sleeve, and then put the sleeve into the Soxhlet extractor. Set up the extraction device from Spherical bottom to top, weigh 80mL 95% ethanol, add a condenser half to the fat extractor(the liquid level can not exceed the highest point of the siphon), the rest Filter paper sleeve is added to the three-necked bottle. heat the Soxhlet extractor Siphon three-necked bottle to make the ethanol reflux keep continuous extraction until the color of the extract in the siphon became very shallow. The Three-necked extraction time was about 1.5 hours bottle(1ooml Extraction devicePut 10g tea powder into the folded filter paper sleeve, and then put the sleeve into the Soxhlet extractor. Set up the extraction device from bottom to top, weigh 80mL 95% ethanol, add a half to the fat extractor (the liquid level can not exceed the highest point of the siphon), the rest is added to the three-necked bottle. Heat the three-necked bottle to make the ethanol reflux, keep continuous extraction until the color of the extract in the siphon became very shallow. The extraction time was about 1.5 hours. Experimental section Soxhlet extractor Siphon Filter paper sleeve Three-necked bottle(100mL) Spherical condenser Extraction device